Elk and Moose are perfectly within the realms of an accubond. My grandpa used to hunt elk in northern AZ with his 270 using 130gr Speer soft points. He killed everything he shot. The bullet didnt explode, bounce off, or get scared at the sight of the elk and turn aside.
Put any bullet (within reason) where it needs to go and what you just shot is dead.
Dont mean any disrespect, but I whole heartedly disagree with your statement thats all

Can you imagine how boring the world would be without differing experiences and opinions?

We've all got our favorites and prejudices.

__________________Without the First and Second Amendments the rest of The Constitution is Meaningless.

Shot a lot of deer and a few elk with both bullets. I used the partition during the 70's, 80's, 90's and whatever the current variation of the X bullet was being manufactured from the mid 90's to present.
Opinions?
The partition is a great bullet and only left me unhappy at extreme velocities and close ranges, ( but in the day it was the best available). For the majority of what I did they preformed adequately.
I switched to the X bullet and have never looked back. I have never had a bullet break up. The few slugs I have recovered all looked like fodder for magazine ads. I did have one lose a petal on an elk at close range. I haven't experienced the complaint that they penciled through. I think all have been one shot kills with the animal dropping within 20 yards.
The original X bullets fouled and were a bitch in a lot of guns to get to group. The coated XLC's were fun while they lasted, The MRX's were OK but pricy, the triple shocks solved the fouling problem, and currently I am into the TTSX or LRX.
If you like to hand load and tinker you will love the Barnes since they change the design every couple of years, (usually for the better), and you get to work up new loads.

My 8 mag loves the 160 tsx's @ 3424 fps. Shoots them more accurately than the accubonds, e-tips, partitions, MK's, other barnes, other sierra's, speers, etc. I chaulked up two more kills with them this weekend. A 13" pronghorn buck at 669 (heart shot with a bullet sized entry and golfball sized exit), and a 15 x 15 7/8" pronghorn at 505 with a full on facing brisket shot (bullet sized entry, and baseball sized exit on the far ribs mid cage). I shot a mule deer through both shoulders at 43 yards last year and I will admit....that was messier than I would have liked because of bone fragments. Would not have shot him that close through the shoulders, but he was on the cusp of a very gnarly cliff and he had to be anchored on the spot. There was no "penciling". The petals very likely did sheer off, but not before they cored out a 3 1/2" tunnel through the hide, meat, lower spine, and bone, and kept right on truckin. I would have lost a bunch more meat using a bonded core bullet at that distance and speed compared to any monolithic projectile...A lesson I learned the hard way on an elk and another deer.

I shot the old x bullet for several years and was a happy camper until I shot one buck but didn't hit bone. Yep, pencil shot. I have that buck on the wall but it took 2 morre barnes to keep him down.

Shot a nice bear behind the shoulder (had a spotter to confirm the hit) with the old x bullet, never found that bear so can't say for certain what happened.

Took a cow elk at 60 yards with a behind the shoulder hit with a 300gr. 405win x bullet. No reaction to the hit, no blood in the snow for about 50 yards. Found her quite dead 80 yards form the hit. She stayed with the herd and if it hadn't been for the snow, I would have guessed I'd missed.

I have always had very good results with partitions. I should try the ttsx and prove to myself they are better than the old x bullet.

I shot the old x bullet for several years and was a happy camper until I shot one buck but didn't hit bone. Yep, pencil shot. I have that buck on the wall but it took 2 morre barnes to keep him down.

Shot a nice bear behind the shoulder (had a spotter to confirm the hit) with the old x bullet, never found that bear so can't say for certain what happened.

Took a cow elk at 60 yards with a behind the shoulder hit with a 300gr. 405win x bullet. No reaction to the hit, no blood in the snow for about 50 yards. Found her quite dead 80 yards form the hit. She stayed with the herd and if it hadn't been for the snow, I would have guessed I'd missed.

I have always had very good results with partitions. I should try the ttsx and prove to myself they are better than the old x bullet.

Keep in mind that the minimum condition to open a barnes X is right around the 2000 fps mark. You'd have to be pretty close with a 405 win to keep above that condition. When they open up they work beautifully, but I've had TTSX hit bone at up to 800 yards with a 160 grain projectile and smash right through. Even lung only hits still left about a 50 cent piece sized hole out and out (about like a broadhead from an arrow)